Metoprolol is a selective β1-adrenergic receptor antagonist, which has the function of lowering heart rate, reducing myocardial contractility, improving myocardial ischemia and lowering blood pressure, etc. It is commonly used in clinical treatment of coronary heart disease, heart failure and hypertension. The difference between metoprolol tartrate tablets and metoprolol succinate tablets is that metoprolol tartrate is a generic formulation, while metoprolol succinate is an extended-release formulation, which allows for the slow release of the drug so that a steady blood pressure concentration can be maintained for 24 hours. Metoprolol tartrate is a generic formulation that does not maintain a stable blood pressure concentration and requires multiple doses per day, making the use of metoprolol succinate clinically more advantageous. For patients with chronic disease who require long-term use of metoprolol, metoprolol succinate may be preferred.